D.I.R.T Legal Mufflers

? The Best Race Muffler Package In Racing

D.I.R.T. PRO SERIESBoth Dyno & Track Prove

These Mufflers are manufactured of Aluminized steel and are completely tig / mig welded for durability.These flow-thru mufflers are packed with 100% Stainless Steel to eliminate burnout. Other mufflers that are specced are packed with fiberglass and will burn out in a few races. When packing is lost in a muffler you may experiance a horsepower loss up to 10%.